Table 1.
MRI imaging parameters. The imaging parameters of the DW-SSFP dependency acquisitions (AFI, TIR and TSE) are representative of the parameters used, small modifications were made to these acquisitions as protocols evolved.
| DW-SSFP | Turbo inversion-recovery (TIR) | ||
|---|---|---|---|
| q-value (cm−1) | 300 | Resolution (mm3) | 0.9·0.9·0.9 |
| Diffusion Gradient Duration (ms) | 13.56 | Number of inversions | 6 |
| Diffusion Gradient Strength (mTm−1) | 52 | TE (ms) | 14 |
| Flip angles (o) | 24 and 94 | TR (ms) | 1000 |
| No. directions (per flip angle) | 120 | TIs (ms) | 30, 60, 120, 240, 480 & 935 |
| No. non-DW (per flip angle) | 6 (q = 20 cm−1) | Flip angle (o) | 180 |
| Resolution (mm3) | 0.85·0.85·0.85 | GRAPPA acc. factor | 3 |
| TE (ms) | 21 | Bandwidth (Hz per pixel) | 130 |
| TR (ms) | 28 | Acquisition time (per TI) | 40:49 |
| EPI factor | 3 | Number of averages | 1 |
| Bandwidth (Hz per pixel) | 393 | ||
| Acquisition time (per direction/non-DW) | 5:47 | Turbo spin-echo (TSE) – T2 | |
| Acquisition time (per flip angle) | 12:08:42 | Resolution (mm3) | 0.9·0.9·0.9 |
| No. of averages | 1 | Number of echoes | 6 |
| TEs (ms) | 13, 25, 38, 50, 63 & 76 | ||
| Actual flip-angle imaging (AFI) – B1 | TR (ms) | 1000 | |
| Resolution (mm3) | 3·3·3 | Flip angle (o) | 180 |
| TE (ms) | 1.5 | GRAPPA acc. factor | 2 |
| TR1/TR2 (ms) | 4.4/11 | Bandwidth (Hz per pixel) | 166 |
| Flip angle (o) | 60 | Acquisition time (per TE) | 36:01 |
| Bandwidth (Hz per pixel) | 630 | Number of averages | 1 |
| Acquisition time | 0:41 | ||
| Number of averages | 1 | ||